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1. How many chambers does the heart of a cow have?
2. What vessel carries blood away from the human heart?
3. How many hearts does an octopus have?
4. The human heart has 4 chambers. What is the top chamber called?
5. The average human heart is the size of a ......?
6. What mammal has the largest heart?
7. What mammal has the highest blood pressure?
8. What mammal has the fastest heart rate?
9. What animal has 4 heart?
10. Who's heart beats faster?